| Citation: | SHAO L，PENG Y，LU X，et al. Optimization method for inlet and outlet of irregular fuel tank inerting system[J]. Journal of Beijing University of Aeronautics and Astronautics，2023，49（10）：2628-2634 （in Chinese） doi: 10.13700/j.bh.1001-5965.2021.0768
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An optimization method appropriate for the irregular fuel tank inerting system is proposed based on the Entropy-weight improvement TOPSIS method in order to address the issues of uneven oxygen distribution and insufficient inerting when the irregular fuel tank is inserted. When combined with the numerical simulation method, the comprehensive evaluation is carried out, and the optimization design for the Boeing 747 inerting system is then realized. The results show that: The inerting scheme designed by the Entropy-weight improvement TOPSIS method can not only reduce the flow demand of inert gas but also make the oxygen distribution more uniform. The optimization inerting scheme of Boeing 747 aircraft has improved the comprehensive performance metrics by 22.67%, the speed metrics by 2.97%, and the uniformity metrics by 27.78%. The design idea of a “one-side bias placement ” inerting scheme can increase the flow path and prolong the existence time of inert gas so that the oxygen distribution is more uniform and the oxygen concentration decreases rapidly when the fuel tank is inserted.
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